package com.sky.aspect;

import com.sky.anno.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * @version 1.0
 * @Title: AutoFillAspect
 * @Author 张宇
 * @Package com.sky.aspect
 * @Date 2025/9/28 14:14
 */

/**
 * 公共字段自动填充切面类
 */
@Slf4j
@Component
@Aspect
public class AutoFillAspect {


    @Before("@annotation(com.sky.anno.AutoFill)")
    public void autoFill(JoinPoint joinPoint) {
        // 先获取目标方法上的注解,并拿到里面的属性
        log.info("开始公共字段的填充");
        MethodSignature signature = (MethodSignature) joinPoint.getSignature(); // 方法签名
        Method method = signature.getMethod();  // 方法对象
        AutoFill annotation = method.getAnnotation(AutoFill.class);
        OperationType value = annotation.value();

        // 获取目标方法的对象参数
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length < 0) {
            return;
        }

        Object entity = args[0]; // 拿到的实体对象

        try {
            // 判断注解中属性值,如果是UPDATE补充2个字段
            if (value == OperationType.INSERT) {
                // 通过反射获取去补充属性
                Method setCreateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME, LocalDateTime.class);
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setCreateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER, Long.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);

                setCreateTime.invoke(entity, LocalDateTime.now());
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setCreateUser.invoke(entity, BaseContext.getCurrentId());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());

            } else if (value == OperationType.UPDATE) {
                // 判断注解中属性值,如果是INSERT补充4个字段
                Method setUpdateTime = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME, LocalDateTime.class);
                Method setUpdateUser = entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER, Long.class);
                setUpdateTime.invoke(entity, LocalDateTime.now());
                setUpdateUser.invoke(entity, BaseContext.getCurrentId());

            }
        } catch (Exception e) {
            throw new RuntimeException();
        }
    }
}
